// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef UI_VIEWS_CONTROLS_LINK_H_
#define UI_VIEWS_CONTROLS_LINK_H_

#include <string>

#include "base/macros.h"
#include "third_party/skia/include/core/SkColor.h"
#include "ui/views/controls/label.h"

namespace views {

class LinkListener;

////////////////////////////////////////////////////////////////////////////////
//
// Link class
//
// A Link is a label subclass that looks like an HTML link. It has a
// controller which is notified when a click occurs.
//
////////////////////////////////////////////////////////////////////////////////
class VIEWS_EXPORT Link : public Label {
public:
    Link();
    explicit Link(const base::string16& title);
    ~Link() override;

    const LinkListener* listener() { return listener_; }
    void set_listener(LinkListener* listener) { listener_ = listener; }

    // Label:
    const char* GetClassName() const override;
    gfx::NativeCursor GetCursor(const ui::MouseEvent& event) override;
    bool CanProcessEventsWithinSubtree() const override;
    bool OnMousePressed(const ui::MouseEvent& event) override;
    bool OnMouseDragged(const ui::MouseEvent& event) override;
    void OnMouseReleased(const ui::MouseEvent& event) override;
    void OnMouseCaptureLost() override;
    bool OnKeyPressed(const ui::KeyEvent& event) override;
    void OnGestureEvent(ui::GestureEvent* event) override;
    bool SkipDefaultKeyEventProcessing(const ui::KeyEvent& event) override;
    void GetAccessibleState(ui::AXViewState* state) override;
    void OnEnabledChanged() override;
    void OnFocus() override;
    void OnBlur() override;
    void SetFontList(const gfx::FontList& font_list) override;
    void SetText(const base::string16& text) override;
    void OnNativeThemeChanged(const ui::NativeTheme* theme) override;
    void SetEnabledColor(SkColor color) override;

    void SetPressedColor(SkColor color);
    void SetUnderline(bool underline);

    static const char kViewClassName[];

private:
    void Init();

    void SetPressed(bool pressed);

    void RecalculateFont();

    SkColor GetEnabledColor();
    SkColor GetPressedColor();

    LinkListener* listener_;

    // Whether the link should be underlined when enabled.
    bool underline_;

    // Whether the link is currently pressed.
    bool pressed_;

    // The color when the link is neither pressed nor disabled.
    SkColor requested_enabled_color_;
    bool requested_enabled_color_set_;

    // The color when the link is pressed.
    SkColor requested_pressed_color_;
    bool requested_pressed_color_set_;

    DISALLOW_COPY_AND_ASSIGN(Link);
};

} // namespace views

#endif // UI_VIEWS_CONTROLS_LINK_H_
